Earths Core

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Transcript of Earths Core

Inner Core The inner core is at the center of the earth. It is a solid ball, estimated to have a radius of around 1220 kilometers, and it is made out of mostly iron and nickel (in the solid state). The inner core is estimated to reach 5000 - 6000 degrees Celsius. It is believed that the inner core is too hot to hold a magnetic field.Outer CoreThe outer core is found about 4800 km below the earths surface. It is estimated to reach between 2200 - 5000 degrees Celsius. The outer core is made from iron, gold, nickel and lighter things in their liquid states. The earths magnetic . field is believed to come . from this outer core.MantleThe Mantle is the layer second from the surface of the Earth. It exists from the bottom of the Crust (about 75 km down) to roughly 2900 kilometers down. It is made of iron and nickel in their liquid states. However unlike the outer core, it is a highly viscous liquid, meaning that it is almost solid and flows very slowly. The temperature of the mantle ranges from 500 to 900 degrees Celsius.CrustThe earths crust is everything from the surface down to 75 kilometers. It is the coolest of the four layers, and sits on top of the mantle. It is the right temperature to sustain life and is made of solid materials.